东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (6): 831-835.DOI: 10.12068/j.issn.1005-3026.2014.06.016

• 材料与冶金 • 上一篇    下一篇

钒渣钙化焙烧的影响因素及焙烧氧化动力学

张菊花，张伟，杨勇霞，张力   

  1. (东北大学 材料与冶金学院， 辽宁 沈阳110819)
  • 收稿日期:2013-08-07 修回日期:2013-08-07 出版日期:2014-06-15 发布日期:2014-04-11
  • 通讯作者: 张菊花
  • 作者简介:张菊花(1985-)，女，山西忻州人，东北大学博士研究生.
  • 基金资助:
    钢铁冶金及资源利用教育部重点实验室开放基金资助项目(FMRU2007K10).

Influencing Factors of Vanadium Slag Roasting with Calcium and Oxidation Kinetics for Roasting Process

ZHANG Juhua， ZHANG Wei， YANG Yongxia， ZHANG Li   

  1. School of Materials & Metallurgy， Northeastern University， Shenyang 110819， China.
  • Received:2013-08-07 Revised:2013-08-07 Online:2014-06-15 Published:2014-04-11
  • Contact: ZHANG Juhua
  • About author:-
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摘要： 采用钙化焙烧方式处理转炉钒渣以提高钒的浸出率，考察了焙烧参数(渣样粒度，升温速率，焙烧保温温度及保温时间，配钙量)对钒浸出率的影响，根据钒渣氧化的TG-DSC曲线对钒渣氧化变温动力学进行了分析.结果表明:降低升温速率可提高钒氧化率，保温温度高于600℃时钒浸出率迅速增加.在钒渣粒径48~75μm，外配钙m(CaO)/m(V2O5)为042，升温速率2℃·min-1，保温温度850℃，保温时间150min的条件下，钒浸出率达9331%.钒尖晶石氧化过程受三级化学反应控制，升温速率为5和10℃·min-1的表观活化能分别为26765，25603kJ·mol-1.

关键词: 钒渣, 钒浸出率, 钙化焙烧, 氧化动力学, 表观活化能

Abstract: Vanadium slag was treated by calcium roasting to improve the vanadium leaching rate. The effects of the operational parameters including particle size， heating rate， holding temperature， holding time and amount of additive of CaO on the roasting efficiency were investigated. The oxidation kinetics of vanadium slag was analyzed on the basis of TG-DSC curves. The results indicated that lowering heating rate is beneficial to improve the vanadium oxidation efficiency， and the vanadium leaching rate increases markedly when the holding temperature is higher than 600℃. The vanadium leaching rate reaches to 9331% under the optimum conditions of the particle size of 48~75μm， m(CaO)/m(V2O5)=042， the heating rate of 2℃·min-1， the holding time of 150 min at 850℃. The oxidation process of vanadium spinel is described by a thirdorder reaction and the apparent activation energies at the heating rates of 5 and 10℃·min-1 are 26765 and 25603kJ·mol-1， respectively.

Key words: vanadium slag, vanadium leaching rate, calcium roasting, oxidation kinetics, apparent activation energy

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